The Delhi Police has been placed on high alert and has asked its counterparts across India to tighten security after receiving an intelligence tip-off of a possible terror attack in crowded public spaces, a senior police officer said. “The Delhi Police special cell has issued an advisory to all security agencies across the country to beef up the security measures at interstate bus terminals, railway stations, five-star hotels, malls and markets, religious places, embassies of western countries, metro stations, airports, stadiums, and tourist places or other sites visited by foreign nationals,” the officer said. The security agencies have also been directed to keep a tab on suspicious articles, if found, in vehicles and to conduct proper checking on interstate borders. Rediff.com : 19th. June,17